.markdown {
  width: 100%;
  display: flex;
  justify-content: space-between;
}
.markdownContent {
  width: 49%;
}
.preview {
  width: 49%;
  background-color: aqua;
  height: 600px;
  background-color: #f5f5f5;
  color: rgba(0, 0, 0, 0.25);
  border: 1px solid #d9d9d9;
  overflow-y: auto;
  padding: 0 13px;
}
.container{
  position: fixed;
  z-index: 9;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(0, 0, 0, 0.3);
}
.spin{
  position: absolute;
  left: 42%;
  top: 45vh;
}